Headlamp like a skilhunt H02 or H03, takes 18650 and cr123. It’s the most flexible light I can think of. It shines where you look at and fo traveling with a bike a headlamp is a must have. Try setting up a tent/tarp or fixing your bike in the dark while holding a flashlight: annoying as sh*t.
H02 review
H03review
I’m just saying skilhunt cause those are the ones I use(d) and liked the most but look around nd maybe you’l find some other headlamps that might suit u better.